Abstract

The X-ray binary Cyg X-3 has been observed on three occasions during
1975 and 1976 by the GSFC Cosmic X-Ray Spectroscopy Experiment on OSO 8.
The X-ray spectra from all three observations can be represented by
power-law continua with strong iron line emission. Comparisons of
spectra taken within the same observation at various phases of the 4.8
hour period reveal a relative excess of low-energy X-ray emission near
zero phase (i.e., the minimum) of the 4.8 hour modulation. In addition,
the centroid of the line emission is observed to vary in phase with the
4.8 hour cycle. The possibility of persistent thermal X-ray emission
from material surrounding the binary system is introduced in an effort
to account for the observed effects.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi),
formats (Postscript, PDF, etc), page sizes
(US Letter, European A4, etc), and compression (gzip,compress,none)
can be set through the
Printing Preferences